/*
 *   Copyright (c) 2008, Ueda Laboratory LMNtal Group <lmntal@ueda.info.waseda.ac.jp>
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions are
 *   met:
 *
 *    1. Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *
 *    3. Neither the name of the Ueda Laboratory LMNtal Group nor the
 *       names of its contributors may be used to endorse or promote
 *       products derived from this software without specific prior
 *       written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

package lavit.ltl;

import java.awt.BorderLayout;
import java.awt.Font;

import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.border.TitledBorder;
import javax.swing.undo.UndoManager;

import lavit.Env;
import lavit.FrontEnd;
import lavit.util.CommonFontUser;
import lavit.util.SimpleUndoKeyListener;
import lavit.util.SimpleUndoableEditListener;

@SuppressWarnings("serial")
class LtlSymbolPanel extends JPanel implements CommonFontUser
{
	private JTextArea symbolArea;
	private UndoManager symbolUndoManager = new UndoManager();

	public LtlSymbolPanel()
	{
		setBorder(new TitledBorder("Propositional Symbols"));
		setLayout(new BorderLayout());

		symbolArea = new JTextArea();
		symbolArea.getDocument().addUndoableEditListener(new SimpleUndoableEditListener(symbolUndoManager));
		symbolArea.addKeyListener(new SimpleUndoKeyListener(symbolUndoManager));
		add(new JScrollPane(symbolArea), BorderLayout.CENTER);

		loadFont();
		FrontEnd.addFontUser(this);
	}

	public void loadFont()
	{
		Font font = new Font(Env.get("EDITER_FONT_FAMILY"), Font.PLAIN, Env.getInt("EDITER_FONT_SIZE"));
		symbolArea.setFont(font);
	}

	public void setText(String str)
	{
		symbolArea.setText(str);
		symbolUndoManager.discardAllEdits();
	}

	public String getText()
	{
		return symbolArea.getText();
	}
}
